Brake shoe



e g M255 "Y'. EEODGE BRAKE SHOE Filed April 20, 1925 Patented Dec. 29, 1925.

UNITED STATES PATENT OFFICE.

ADDED Y. DODGE, OF SOUTH BEND, INDIANA, ASSIGNOR TO BENDIX BRAKE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

BRAKE SHOE.

Application filed April 20,1925. Serial 1%. 24,426.

To all whom it may concern:

Be it known that 1, Armin Y. Donon, a citizen of the United States, and a resident of South Behd, St. Joseph County, Indiana,

5 have invented certain new and useful Improvements in Brake Shoes, of which the following is a specification.

This invention relates to brake shoes, and is illustrated as embodied in an automobile l brake. An object of the invention is to provide a novel shoe construction and arrangement permitting the manufacture of the shoes by pressing or stamping them out. An important feature of the invention relates to forming the parts to provide members extended at one end of the shoe to be anchored,

or to be connected to another shoe. Preferably the inner ends of these arms are reinforced by a plate or "the like bridging the 39 arms, and illustrated as forming a continuation of the lining-supporting surface. 4

The above and other objects and features of the invention, including various novel combinations of parts and desirable particula'r constructions, will be apparent from the following description of oneillustrative embodiment shown in the accompanying drawin s, in which:

ig. 1 is a vertical section through the brake, just inside the wheel, showing the shoes in side elevation;

Fig. 2 is a side elevation of one of the shoes, without the brake linings, detached from the brake; V

Fig. 3 is an elevation of the same shoe, looking outwardly from the center of the brake;

Fig. 4 is an elevation of the shoe, turned around l80degrees from its position in Fig. 40 3; and

Fig. 5 is a vertical section on'the line 55 of Flg. 1, showing theconstruction of the shoes.

In the arrangement selected for illustration, the brake comprises a drum 10, which is rotatably mounted to turn with the road. wheel or with the propeller shaft, in the case of a vehicle: Within the drum are arranged a reverse shoe 12, a forward shoe 14,

' and a servo shoe 16 connected to the forward shoe. The reverse shoe 12'and the servo shoe 16 are identical and interchangeable. The brake is aplplied by a double cam 18, which operates 0e 12 directly, and which forces shoe 16 against the drum so that it is urged circumferentially by the friction in such a manner as to apply shoe 14. A main spring 20 urges shoes 12 and 16 away from the drum, and an auxiliary spring 22 holds shoe 14 away from the drum until overcome by the movement of shoe 16. The brake lining is shown at 24.

Each shoe comprises a pair of comparatively shallow channel members riveted or otherwise secured back to back, as appears in Fig. 5. The inner flanges 26 which extend outwardly parallel to the axis of the drum are relatively short, and are for the purpose of stiflening and reinforcing the shoe. The outer flanges 28 are longer, and together form a circumferential part supporting the brake lining 24, riveted or otherwise secured thereto. At the adjacent ends of shoes 12 and 16, the radial central parts of the channels are turned outwardly to form transverse radial flanges 30, to which are riveted or otherwise secured the wear plates 32 for cam 18.

The radial central parts of the channels together form a central radial part or web 34. At the ends of shoes 12 and 16 the parts of web 34 are spread apart and continued as arms 36 and 38 straddling the web 34 of shoe 14. Shoe 12 is anchored by a pivot 40 passing through a relatively large openin in web 34 of shoe 14, and shoe 14 is anchore by a pivot pin 42 passing through ielatively large openings 44 in the arms 36 and 38 of shoe 12, thus in effect overlapping the shoes and giving a much larger area of brake linin in engagement with the drum. Preferab y the backing pl te 46 of the brake is reinforced at the anclibrs by a heavier plate 48. Arms 36 and 38 of shoe 16 are pivotally connected to the web 34 of shoe 14 by a pivot pin 50, which may have a head slidabl held against the backing plate 46, to stea y the shoes, partly by spring 22, and partly by a spring 52 secured to a pin 54 bridging the outer opening 44 and seated in stamped depressions 56 (Fig. 2). The metal of arms 36 and 38 may be drawn out as tubular projections 58 forming in efiect integral bushings sleeved on the pivot pin or on the anchor 40.

Preferably the arms 36 and 38 of each shoe are reinforced, and the area of the brake lining increased, by a reinforcing plate 60, shown as set down intothe arms to form in effect a continuation of flanges 28. Plates may be riveted, or spot welded or otherwise secured, to short flanges on arms 36 and 38 extending outwardly parallel to the axis of-the drum.

It shouldbe noted that the outer surfaces of the shoes are so formed that the lining is coaxial with the drum when the brake is ap plied, instead of coaxial when the brake is ofi, in the usual manner, thus giving maximum efi'ective engagement with the drum. The free ends of shoes 12 and 16 are confined laterally by a plate 62 carried by posts 64 extending through slots in the webs 3A of the shoes, and slidably engaged by the ed es of the cam plates 32.

eretofore stamped brake shoes have usually been of channel section, the circumferential part bottoming in the die and sprin ing back a variable amount when release making it difficult to secure shoes of accurate curvature. By my invention, the web 34 bottoms in the die and, being flat, has little tendency to distortion. Moreover when the two webs are fastened together any distortion of one is offset by the other.

While one illustrative embodiment has been described in detail, it is not my intention to limit the scope of the invention to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim:

1. A brake shoe comprising, in combination, pressed metal parts arranged to form a circumferential lining-supporting surface and radial reinforcin parts, said radial parts being extended in spaced relation to each other beyond the circumferential surface to form a pair of spaced anchoring arms.

2. A brake shoe made of pressed metal arts arranged to provide radial reinforcmg flanges spaced inwardly-from the side ed es of the, shoe and spread apart at one en of the shoe to form substantiall arallel arms adapted to straddle the en 0 an adjacent shoe.

3. A brake shoe made of pressed metal parts arranged to rovide radial reinforcing fianges'spaced mwardly from the side edges of the shoe and spread apart at one end of the shoe to form substantially arallel arms adapted to straddle the en of 7 an adjacent shoe, the arms being formed for pivotal engagement with an anchor at their ends.

4. A pressed metal shoe having atliningsupporting cylindrical part and spaced parallel arms projecting a substantial distance beyond the end of the cylindrical part and adapted to straddle the end of an adjacent shoe.

5. A ressed metal shoe having a liningsupportmg cylindrical part and spaced parallel arms projectin a substantial distance beyond the end of t e cylindrical part and adapted to straddle the end of an adjacent shoe, the arms being formed with relatively large openings to provide clearance for the anchor of said adjacent shoe.

6. A brake shoe made up of two stampings, each having a central web with a continuous flange extending throughout substantially its entire edge, and part of which flange is substantially cylindrical, the webs extending as spaced parallel arms at one end of the shoe and the cylindrical flange parts forming a lining-supporting surface.

7. A T-scction sheet-metal shoe having spaced anchoring arms projecting at one end and adapted for engagement withan operating device at its other end.

8. A pressed metal brake shoe comprising a pair of parts with circumferential flanges supporting the brake lining and with radial I flanges engaging each other and extended and bent to form spaced arms at the end of the shoe, and means for fastening the radial flanges together. v

9. A pressed metal brake shoe comprising two parts having radial flanges secured together, and having oppositely-projecting circumferential flanges cooperatin to form a support for the brake l1ning, t e radial flanges being extended to form parallel spaced arms at one end of the shoe.

10. A brake shoe having a circumferential lining-supporting part and spaced arms projecting beyond the circumferential part,

and a late bridging the arms at their inner cuts and forming substantially a continuation of the circumferential part.

11. A brake shoe having a circumferential lining-supporting part and spaced arms projecting beyond the circumferential part, and a reinforcin plate bridging thearms at their inner ends.

12. A brake shoe having a circumferential lining-supporting part formed with a central radial part branching in the form of a Y at the end of the shoe to form spaced arms, and a reinforcin member secured to said arms adjacent their junction.

13. A brake shoe having a' circumferential lining-sup orting art and spaced arms projecting at t e end 0? the shoe, and a plate bridging the arms, the late and said art being arranged with their outer sur aces substantially in the same cylindricallycurved surface.

14'. A brake shoe having a circumferential lining-supporting part and a central ressed channel members fastened back to ack, the outer flanges forming a circumferential lining-supporting surface, and the radial parts of the channels being spread apart atone end of the shoe and extended as spaced arms.

16. A pressed metal brake shoe having a central radial flange with an opening, the flange being drawn out to form a sleeve surrounding the opening and forming in effect an integral bushing for the openin l 7. A pressed brake shoe having a pair of parts arranged substantially-in radial planes and formed with aline'd openings, the metal with the metal about the openings drawn 20 out to form coaxial sleeves.

19. A pressed metal brake shoe having a pair of spaced arms at one end and a pair of eo-planar generally radial flanges at the opposite end, and a wear plate secured to 25 the flanges. In testimony whereof I have hereunto signed my name.

ADIEL YQDODGE. 

